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Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
Measurements of the electrical properties of transmitting tubes Methods of measuring the distortion in the chrominance signal due to the luminance (differential gain and differential phase)
WITHDRAWN published on 15.8.1991
Selected format:Measurements of the electrical properties of trausmitting tubes Methods of measuring the press of synchronizing pluse
WITHDRAWN published on 15.8.1991
Selected format:Measurements of the electrical properties of transmitting tubes Measuring methods of reverse grids current
WITHDRAWN published on 15.8.1991
Selected format:Measurements of the electrical properties of transmitting tubes Measuring methods of grid thermo-emission current
WITHDRAWN published on 15.8.1991
Selected format:Measurements of the electrical properties of transmitting tubes Measuring methods of transconductance and amplification factor
WITHDRAWN published on 15.8.1991
Selected format:Measurements of the electrical properties of transmitting tubes Measuring methods of anode ion current
WITHDRAWN published on 15.8.1991
Selected format:Measurements of the electrical properties of transmitting tubes Measuring methods of maximum anode dissipation power and anode overload dissipation power
WITHDRAWN published on 15.8.1991
Selected format:Measurements of the electrical properties of transmitting tubes Measuring methods of maximum grid dissipation power
WITHDRAWN published on 15.8.1991
Selected format:-
WITHDRAWN published on 1.1.1964
Selected format:Methods of measurement of fluorescent display tubes
WITHDRAWN published on 1.1.1983
Selected format:Latest update: 2026-03-29 (Number of items: 2 269 691)
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